在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
</head> 
<body>

<table id="myTable" border="1">
	<tr>
		<th>月份</th>
		<th>储蓄</th>
	</tr>
  	<tr>
		<td>一月</td>
		<td>$100</td>
  	</tr>
  	<tr>
		<td>二月</td>
		<td>$150</td>
  	</tr>
</table>
<br>
<button type="button" onclick="myFunction()">折叠边框</button>
<script>
function myFunction(){
	document.getElementById("myTable").style.borderCollapse="collapse";
}
</script>

</body>
</html>
源代码

动行结果
